21029016 has 32 divisors (see below), whose sum is σ = 53467200. Its totient is φ = 6890400.

The previous prime is 21029003. The next prime is 21029033. The reversal of 21029016 is 61092012.

It is a junction number, because it is equal to n+sod(n) for n = 21028983 and 21029001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6010 + ... + 8841.

It is an arithmetic number, because the mean of its divisors is an integer number (1670850).

Almost surely, 2^21029016 is an apocalyptic number.

It is an amenable number.

21029016 is an abundant number, since it is smaller than the sum of its proper divisors (32438184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21029016 is a wasteful number, since it uses less digits than its factorization.

21029016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14919 (or 14915 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 21029016 is about 4585.7405072682. The cubic root of 21029016 is about 276.0194273240.

The spelling of 21029016 in words is "twenty-one million, twenty-nine thousand, sixteen".